Expansion joint



A. c. FISCHER 1,881,437-

Oct. 11,' 1932.

I EXPANSION JOINT,

Original Filed May 25, 1921 Ewe/22W- I dZberZ C [256/765 WM 127% My atented Get. 11, 1932 ALBERT C. FISCHER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE PHILIP CAREY I MANUFACTURING COMPANY, A CORPORATION OF OHIO mransron :rom'r Original application filed May 25, 1921, Serial No. 472,319, now Patent No. 1,662,567, March 13, 1928.

I Divided and this application filed April 14, 1926. Serial Ito. 101,940.

This application is a division of my case Serial No. 472,319, filed May 25, 1921, and which matured into Patent No. 1,662,567, March 13, 1928, for expansion joints, and relates particularly to the subject matter of a foliated structure, as disclosed in the drawing of said application, and particularly to that portion in which it is stated the material of the present invention may be waterproofed and suitably coated in various ways to preserve its body and protect it against the wear of the traffic.

This invention relates to improvements in expansion joint used for paving and construction pur oses and any situation where pzxpansion and contraction must be provided or. Heretofore it has been customary to either pour the joint or build up solid bituminous joints or solid composition joints, Which,

upon being put under pressure would be compressed and become elongated surfaces, or bulge under compression.

This invention relates particularly to a flexible boardlike structure in contra-distinction to a rigid, boardlike structure, and is composed of vegetable fibres of various kinds, such as, flax, hemp, straw or any other ingredients which may be suitably matted together so in felted form, or otherwise interwoven, as

is customary in forming such fibrous material into continuous sheets This vegetable material may be waterproofed or not, as is preferred, by injecting therein any bituminous or petroleum waterproofing saturants adapted thereto, thus making the material waterproof but not destroying the felted, matted form, which gives to the expansion joint the inherent power of compression within itself and the power to re-expand of its own accord. The use of such fibrous material prevents breakage of the joint, thus enabling it to be handled in a rough manner and still not be destroyed, whereas all solid bituminousjoints, whether provided with felt sides or otherwise, become very brittle in cold weather and a minimum shock breaks or cracks the entire joint.

Heretofore it has been customary either to mix material like that usedfor roofing felt in with the asphalt, making a solid, heavy bituminous joint, or use a heavy body structure and apply saturated felt as side surfacing materials to the solid body structure, or else to build up the joint from such saturated felts in layers with bituminous layers between the sheets of saturated felt, in the same manner as 3 and 4-ply roofing materials have been prepared.

Another object of my invention is to pre- 69 pare a joint which is lighter in structure than solid bituminous joints, thus efiecting economy in transportation and effecting economy in the necessary amount of solid material needed for the expansion joint. Heretofore, the solid bituminous joints, when-under compression in warm weather, have always oozed out of the crevice and have been flattened on the pavement by the passing traffic, so that the bituminous matter could not get back into 70 the crevice, thus making a defective joint. By using a fibrous body of the type described this cannot happen, as the material is both compressible within itself and re-expansive when the pressure is released, without oozing out of thecrevice. The material of the present invention may be waterproofed, as stated before, and suitably coated in various ways to preserve its bod and protect it against the wear of the tra c.

For a better understanding of theinvention reference may be had to the drawing showing a perspective view of an expansion joint strip embodying my invention.

This invention relates particularly to a fo- 35' liated matted fibrous material in a state free from waterproofing suitably coated in various ways to preserve its body, or a foliated structure in which the elements or vegetable fibrous material 0 is waterproofed and suitably coated in various ways. The fibrous material, comprising a core, is faced with a relatively thick layer 0 which if desired may be extended to enclose the edges of the core and provide a crown 0 on one edge.

This invention relates particularly to said Vegetable material which can be prepared in a leafy state and built up into a foliated matted structure, and particularly to the waterproofing of said foliations or leafy sections,

' stated. ltn one conventional method felt sheets are saturated and coated with waterproofing material, then built up in layers by pressing the sheets together. This invention relates to coating the foliations with a waterproofing substance and pressing them together, buildin up a foliated construction in which the fbliations have a substantial amount of waterproof coating lying between the foliations. In this instance the fibrous material would not be waterproofed in itself, but by the coating surrounding the dry unpenetrated fibrous material. By waterproofing the fibrous material as a thin coating, the same foliated structure is built up with the fibrous material waterproofed and coated.

Conventionally, as previously stated, fibrous material in continuous sheets is saturated with a waterproofing material and then coated with a higher melting point bituminous material for the purpose of protecting the interior.

Any suitable machinery may be employed in the proper saturation and coating of the foliations described and illustrated in the drawing. Another practice in the art is to utilize mixers having paddles, as distinguished from kneading machines, in which fibrous material can be coated with bituminous material in the foliated form, as described in this invention. This can be accomplished by utilizing heated bituminous material and incorporating therein foliated matter either in a penetrated or unpenetrated state, coating said foliations thru the paddle mixing process, forming same into preformed expansion joints of foliated waterproof structure.

I claim:

1. An expansion joint comprising a flexible, board-like strip, embodying in its structure interrupted and substantially parallel, compressible and elastic felted mats of fibrous material, coated but unsaturated with a Waterproofing material and irregularly overlapping one another, said strip being enveloped in a substantial thickness of bituminous material.

2. An expansion joint comprising a flexible, board-like strip, mbodying in its structure interrupted and substantially parallel compressible and elastic felted mats of fibrous material irregularly overlapping one another, and coated but unsaturated with a substantial layer of waterproofing material, said strip being enveloped by a substantial thickness of plastic waterproofing material.

3. Constructional material including mats of felted mats of fibrous material coated, but unsaturated with waterproofing material, said mats being built up into a composite structure and faced with relatively thick lay ers of bituminous material.

4. constructional material having felted Learner mats of fibrous material, each felted mat being coated but unsaturated with waterproof ing material, said felted mats having a substantial amount of waterproofing coating lying between them and an enveloping jacket of bituminous material.

Signed at Chicago, Illinois, this 30th day of March, 1926.

ALBERT C. FISCHER. 

